Sokrates: You remember how I used to say that only active dialogue--questions-and-answers, objections-and-replies--could convey true knowledge? That a flat wax tablet covered by written words could only convey an inadequate and pale simulacrum of education?
Aristoteles: Yes. And you remember how I showed you that you were wrong? That conversation is ephemeral, and very quickly becomes too confused to be a proper educational tool? That only something like an organized and coherent lecture can teach? And only something like the textbooks compiled by my lecture notes can make that teaching durable?
Aristokles: But, my Aristoteles, you never mastered my "dialogue" form. My "dialogue" form has all the advantages of permanence and organization of your textbooks, and all the advantages of real dialectic of Sokrates's conversation.